a nightmare scenario for the u.s. the united nations now estimates that 70,000 people have been killed in the fighting, though, no one really knows. a u.n. commission today called for war crimes investigations of both sides. assad's government, which has sought to crush the rebellion by any means necessary. and the rebels, many of whom are increasingly seen by ordinary syrians as war lords, gangsters and religious fanatics who regularly post videos of beheadings and other atrocities on youtube. damascus is quiet tonight. some light traffic. no one really walking around. 5 million people hunkered down, as the terrible war that is tearing their country apart has now arrived here, in fierce battles raging in the city's suburbs. syria's many minorities live in terror of a jihadist takeover of their country. before we came here, we visited christian refugees from syria who had fled to beirut. they said they were forced out of their villages by muslim fundamentalists -- ethnically cleansed. they supported the rebellion at f